Numbers n such that n=phi(phi(n)+sigma(n)) and n is not of the form 2*p where p is a Sophie Germain odd prime.

A097652

Numbers n such that n=phi(phi(n)+sigma(n)) and n is not of the form 2*p where p is a Sophie Germain odd prime.

Terms

    a(0) =1a(1) =2a(2) =20a(3) =48a(4) =180a(5) =208a(6) =864a(7) =1120a(8) =1368a(9) =3552a(10) =58320a(11) =76416a(12) =79968a(13) =95488a(14) =107520a(15) =338688a(16) =570240a(17) =595968a(18) =653184a(19) =1347840a(20) =5199552a(21) =7918848a(22) =14592000a(23) =93699072a(24) =159138176a(25) =167078784a(26) =246688000a(27) =281640960a(28) =314548224a(29) =323985408

External references